#    Copyright 2012 New Mexico EPSCoR
#
#    This file is part of Teacher's P.E.T.
#
#    Teacher's P.E.T. is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    Teacher's P.E.T. is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with Teacher's P.E.T..  If not, see <http://www.gnu.org/licenses/>.

import os

from django.conf import settings
from django.core.files.storage import FileSystemStorage

class OverwriteStorage(FileSystemStorage):
    def get_available_name(self, name):
        """
        Returns a filename that's free on the target storage system, and
        available for new content to be written to
        """
        # If the filename already exists, remove it as if it was a true file ystem
        if self.exists(name):
            os.remove(os.path.join(settings.MEDIA_ROOT, name))
        return name